在Android中使用webrtc保存视频文件时遇到问题
我正在开发基于webrtc的视频聊天应用程序,目前视频通话正在运行,但我想使用VideoFileRenderer从远程视频流录制视频,该接口有许多实现,例如: 这是我正在使用的实现。它将视频保存到文件中没有问题,但我只能在使用编解码器后在桌面上播放,因为文件是.y4m而不是.mp4,当我尝试使用VideoView播放它时,它说它无法播放视频,即使我尝试使用android附带的视频播放器播放视频,它也无法播放,我只能使用MXPlayer播放它,VLC或桌面上有编解码器的任何其他应用程序 简化问题:在Android中使用webrtc保存视频文件时遇到问题,android,webrtc,video-codecs,Android,Webrtc,Video Codecs,我正在开发基于webrtc的视频聊天应用程序,目前视频通话正在运行,但我想使用VideoFileRenderer从远程视频流录制视频,该接口有许多实现,例如: 这是我正在使用的实现。它将视频保存到文件中没有问题,但我只能在使用编解码器后在桌面上播放,因为文件是.y4m而不是.mp4,当我尝试使用VideoView播放它时,它说它无法播放视频,即使我尝试使用android附带的视频播放器播放视频,它也无法播放,我只能使用MXPlayer播放它,VLC或桌面上有编解码器的任何其他应用程序 简化问题:
如何在本机android VideoView上播放video.y4m?
我将进一步简化它,我将假设我不了解记录文件的格式,以下是我用于记录文件的代码:
开始录制时:
remoteVideoFileRenderer = new VideoFileRenderer(
fileToRecordTo.getAbsolutePath(),
640,
480,
rootEglBase.getEglBaseContext());
remoteVideoTrack.addSink(remoteVideoFileRenderer);
remoteVideoFileRenderer.release();
完成录制时:
remoteVideoFileRenderer = new VideoFileRenderer(
fileToRecordTo.getAbsolutePath(),
640,
480,
rootEglBase.getEglBaseContext());
remoteVideoTrack.addSink(remoteVideoFileRenderer);
remoteVideoFileRenderer.release();
现在问题又来了:我有一个“fileToRecordTo”,这个视频文件可以在GOM(windows)、VLC(windows、mac和Android)、MXPlayer(Android)上播放,但我既不能使用嵌入Android的播放器(如果可以,我会在我的应用程序中使用这个播放器)也不能在Android原生videoView上播放
任何帮助。仅视频录制
我的项目中也有类似的案例。起初,我尝试了WebRTC的默认VideoFileRenderer,但视频大小太大,因为没有应用压缩。
我找到了这个存储库。这对我来说真的很有帮助。
这是一个循序渐进的指南。我也做了一些调整
将此类添加到项目中。它有很多选项来配置最终的视频格式
import android.media.MediaCodec;
import android.media.MediaCodecInfo;
import android.media.MediaFormat;
import android.media.MediaMuxer;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import android.view.Surface;
import org.webrtc.EglBase;
import org.webrtc.GlRectDrawer;
import org.webrtc.VideoFrame;
import org.webrtc.VideoFrameDrawer;
import org.webrtc.VideoSink;
import java.io.IOException;
import java.nio.ByteBuffer;
class FileEncoder implements VideoSink {
private static final String TAG = "FileRenderer";
private final HandlerThread renderThread;
private final Handler renderThreadHandler;
private int outputFileWidth = -1;
private int outputFileHeight = -1;
private ByteBuffer[] encoderOutputBuffers;
private EglBase eglBase;
private EglBase.Context sharedContext;
private VideoFrameDrawer frameDrawer;
private static final String MIME_TYPE = "video/avc"; // H.264 Advanced Video Coding
private static final int FRAME_RATE = 30; // 30fps
private static final int IFRAME_INTERVAL = 5; // 5 seconds between I-frames
private MediaMuxer mediaMuxer;
private MediaCodec encoder;
private MediaCodec.BufferInfo bufferInfo;
private int trackIndex = -1;
private boolean isRunning = true;
private GlRectDrawer drawer;
private Surface surface;
FileEncoder(String outputFile, final EglBase.Context sharedContext) throws IOException {
renderThread = new HandlerThread(TAG + "RenderThread");
renderThread.start();
renderThreadHandler = new Handler(renderThread.getLooper());
bufferInfo = new MediaCodec.BufferInfo();
this.sharedContext = sharedContext;
mediaMuxer = new MediaMuxer(outputFile,
MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
}
private void initVideoEncoder() {
MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE, 1280, 720);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, 6000000);
format.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, IFRAME_INTERVAL);
try {
encoder = MediaCodec.createEncoderByType(MIME_TYPE);
encoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
renderThreadHandler.post(() -> {
eglBase = EglBase.create(sharedContext, EglBase.CONFIG_RECORDABLE);
surface = encoder.createInputSurface();
eglBase.createSurface(surface);
eglBase.makeCurrent();
drawer = new GlRectDrawer();
});
} catch (Exception e) {
Log.wtf(TAG, e);
}
}
@Override
public void onFrame(VideoFrame frame) {
frame.retain();
if (outputFileWidth == -1) {
outputFileWidth = frame.getRotatedWidth();
outputFileHeight = frame.getRotatedHeight();
initVideoEncoder();
}
renderThreadHandler.post(() -> renderFrameOnRenderThread(frame));
}
private void renderFrameOnRenderThread(VideoFrame frame) {
if (frameDrawer == null) {
frameDrawer = new VideoFrameDrawer();
}
frameDrawer.drawFrame(frame, drawer, null, 0, 0, outputFileWidth, outputFileHeight);
frame.release();
drainEncoder();
eglBase.swapBuffers();
}
/**
* Release all resources. All already posted frames will be rendered first.
*/
void release() {
isRunning = false;
renderThreadHandler.post(() -> {
if (encoder != null) {
encoder.stop();
encoder.release();
}
eglBase.release();
mediaMuxer.stop();
mediaMuxer.release();
renderThread.quit();
});
}
private boolean encoderStarted = false;
private volatile boolean muxerStarted = false;
private long videoFrameStart = 0;
private void drainEncoder() {
if (!encoderStarted) {
encoder.start();
encoderOutputBuffers = encoder.getOutputBuffers();
encoderStarted = true;
return;
}
while (true) {
int encoderStatus = encoder.dequeueOutputBuffer(bufferInfo, 10000);
if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
break;
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
// not expected for an encoder
encoderOutputBuffers = encoder.getOutputBuffers();
Log.e(TAG, "encoder output buffers changed");
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// not expected for an encoder
MediaFormat newFormat = encoder.getOutputFormat();
Log.e(TAG, "encoder output format changed: " + newFormat);
trackIndex = mediaMuxer.addTrack(newFormat);
if (!muxerStarted) {
mediaMuxer.start();
muxerStarted = true;
}
if (!muxerStarted)
break;
} else if (encoderStatus < 0) {
Log.e(TAG, "unexpected result fr om encoder.dequeueOutputBuffer: " + encoderStatus);
} else { // encoderStatus >= 0
try {
ByteBuffer encodedData = encoderOutputBuffers[encoderStatus];
if (encodedData == null) {
Log.e(TAG, "encoderOutputBuffer " + encoderStatus + " was null");
break;
}
// It's usually necessary to adjust the ByteBuffer values to match BufferInfo.
encodedData.position(bufferInfo.offset);
encodedData.limit(bufferInfo.offset + bufferInfo.size);
if (videoFrameStart == 0 && bufferInfo.presentationTimeUs != 0) {
videoFrameStart = bufferInfo.presentationTimeUs;
}
bufferInfo.presentationTimeUs -= videoFrameStart;
if (muxerStarted)
mediaMuxer.writeSampleData(trackIndex, encodedData, bufferInfo);
isRunning = isRunning && (bufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) == 0;
encoder.releaseOutputBuffer(encoderStatus, false);
if ((bufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
break;
}
} catch (Exception e) {
Log.wtf(TAG, e);
break;
}
}
}
}
private long presTime = 0L;
}
当您收到要录制的流(远程或本地)时,可以初始化录制
FileEncoder recording = new FileEncoder("path/to/video", rootEglBase.eglBaseContext)
remoteVideoTrack.addSink(recording)
remoteVideoTrack.removeSink(recording)
recording.release()
通话结束后,您需要停止并释放录音
FileEncoder recording = new FileEncoder("path/to/video", rootEglBase.eglBaseContext)
remoteVideoTrack.addSink(recording)
remoteVideoTrack.removeSink(recording)
recording.release()
这足以录制视频,但没有音频
视频和音频录制
要录制本地对等方的音频,您需要使用此类()。但首先需要设置AudioDeviceModule对象
AudioDeviceModule adm = createJavaAudioDevice()
peerConnectionFactory = PeerConnectionFactory.builder()
.setOptions(options)
.setAudioDeviceModule(adm)
.setVideoEncoderFactory(defaultVideoEncoderFactory)
.setVideoDecoderFactory(defaultVideoDecoderFactory)
.createPeerConnectionFactory()
adm.release()
private AudioDeviceModule createJavaAudioDevice() {
//Implement AudioRecordErrorCallback
//Implement AudioTrackErrorCallback
return JavaAudioDeviceModule.builder(this)
.setSamplesReadyCallback(audioRecorder)
//Default audio source is Voice Communication which is good for VoIP sessions. You can change to the audio source you want.
.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION)
.setAudioRecordErrorCallback(audioRecordErrorCallback)
.setAudioTrackErrorCallback(audioTrackErrorCallback)
.createAudioDeviceModule()
}
合并音频和视频
添加此依赖项
implementation 'com.googlecode.mp4parser:isoparser:1.1.22'
然后在通话结束时将此片段添加到代码中。确保视频和音频录制已正确停止和释放
try {
Movie video;
video = MovieCreator.build("path/to/recorded/video");
Movie audio;
audio = MovieCreator.build("path/to/recorded/audio");
Track audioTrack = audio.getTracks().get(0)
video.addTrack(audioTrack);
Container out = new DefaultMp4Builder().build(video);
FileChannel fc = new FileOutputStream(new File("path/to/final/output")).getChannel();
out.writeContainer(fc);
fc.close();
} catch (IOException e) {
e.printStackTrace();
}
我知道这不是在Android WebRTC视频通话中录制音频和视频的最佳解决方案。如果有人知道如何使用WebRTC提取音频,请添加评论 同样的问题,你是否想过使用“MediaMuxer”转换原始帧,然后将其保存到mp4而不是y4m?我想了想,然后我发现该文件只有视频,但没有音频,我不知道如何获取音频文件,然后我会尝试这样做,如果成功,我会添加答案,如果你知道怎么做,请帮助我@AviramFireberger即使你没有做,但是如果你只通过视频来做,请分享你是如何做到的,然后我可能会帮你不要担心@AviramFireberger,我会,一旦做了,我会在这里标记你,问题是我最近有点忙,但我保证我会继续做这件事,完成后会给你贴上标签,我甚至会尝试通过电子邮件直接与你联系。你在RTC通话中能录制音频吗?你真的做得很好,伙计。@Oliver你从哪里获得remoteVideoTrack?@Oliver我必须添加FileEncoder录制=新的FileEncoder(“路径/到/视频”,rootEglBase.eglBaseContext)remoteVideoTrack.addSink(录音)在CallActivity类中。嘿@Oliver想知道这里收集的音频是来自他人的(通过webrtc),还是来自麦克风输入?